Method and apparatus for recognizing a change-of-state in...

Details Method and apparatus for recognizing a change-of-state in... Method and apparatus for recognizing a change-of-state in...

2006-12-28

2010-06-01

Tran, Khanh C (Department: 2611)

Pulse or digital communications

Cable systems and components

Reexamination Certificate

active

07729428

ABSTRACT:
A method for recognizing a valid change of state in a communication signal including capacitively coupled signals received by an input contact includes maintaining the input contact in a first state and an impedance of the first contact input in a first impedance level, validating that the communication signal sent from to the input contact is a valid change of state, and changing the input contact to a second state and the impedance of the first input contact input to a second impedance level when the voltage signal is validated. An input contact circuit is also disclosed.

REFERENCES:
patent: 5398261 (1995-03-01), Marbot
patent: 5625679 (1997-04-01), Gutzmer
patent: 6476587 (2002-11-01), Sasaki

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